platform/x86: intel-hid: Support Lenovo ThinkPad X1 Tablet Gen 2

Like a few other system the Lenovo ThinkPad X1 Tablet Gen 2 miss the
HEBC method, which prevent the power button from working. Add a quirk
to enable the button array on this system family and fix the power
button.
Signed-off-by: Alban Bedel <albeu@free.fr>
Tested-by: Alexander Kobel <a-kobel@a-kobel.de>
Link: https://lore.kernel.org/r/20210222141559.3775-1-albeu@free.frSigned-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/intel-hid.c

@@ -90,6 +90,13 @@ static const struct dmi_system_id button_array_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable"),
 		},
 	},
+	{
+		.ident = "Lenovo ThinkPad X1 Tablet Gen 2",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
+		},
+	},
 	{ }
 };